In the rich text editor:
@Angel
In a comment:
[Angel](https://chowlings.com/user/Angel)
For Names and Avatars:
In the rich text editor:
%Angel
In a comment:
[![Angel's Avatar](https://chowlings.com/images/avatars/395.PNG?v=1644063288)](https://chowlings.com/user/Angel) [Angel](https://chowlings.com/user/Angel)